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Lithos
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publication venue for: 40Ar/39Ar geochronology and petrogenesis of the Sierra de San Miguelito Volcanic Complex, Mesa Central, Mexico
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Royal Society: NA160116
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funding vehicle for: 40Ar/39Ar geochronology and petrogenesis of the Sierra de San Miguelito Volcanic Complex, Mesa Central, Mexico

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Consejo Nacional de Ciencia y Tecnología, CONACYT: 336677
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funding vehicle for: 40Ar/39Ar geochronology and petrogenesis of the Sierra de San Miguelito Volcanic Complex, Mesa Central, Mexico

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RDF description of 40Ar/39Ar geochronology and petrogenesis of the Sierra de San Miguelito Volcanic Complex, Mesa Central, Mexico - http://orbis.uaslp.mx/vivo/individual/scopus6574
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date: 2026-08-28T03:39:28
publisher: vivo
type: Document

Article
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Information Content Entity
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40Ar/39Ar geochronology and petrogenesis of the Sierra de San Miguelito Volcanic Complex, Mesa Central, Mexico
type: Document
type: Entity
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type: Generically Dependent Continuant
has publication venue: Lithos
most specific type: Document
most specific type: Article
related by: authorship_42931
artnum: 105613
freetext keyword: 40Ar/39Ar dating; Geochemistry; Mesa Central; Mexico; Petrogenesis; San Luis Potosí argon-argon dating; geochronology; igneous geochemistry; isotopic composition; petrogenesis; porphyry; rare earth element; tectonic setting; texture; volcanic rock; Mesa Central; Mexico [North America]; San Luis Potosi; Sierra de San Miguelito; Potos
related by: authorship_42930
has funding vehicle: Royal Society: NA160116
volume: 370-371
related by: authorship_42933
e iscopus: 2-s2.0-85086363106
date time value: article date 6575
has funding vehicle: Consejo Nacional de Ciencia y Tecnología, CONACYT: 336677
related by: authorship_42934
abstract: The southern part of the Mesa Central (MC) province, Mexico, is formed of several Cenozoic volcanic complexes. The Sierra de San Miguelito Complex (SSMC) is in the south-eastern part of the MC. The SSMC consists of: (1) mafic volcanic rocks of porphyritic texture and trachybasalt/basalt compositions; (2) intermediate volcanic rocks of porphyritic texture and basaltic-trachyandesite, basaltic andesite and andesite compositions; and (3) silicic volcanic rocks of porphyritic texture and rhyolite composition. New 40Ar/39Ar dating results, in combination with major- and trace-element data, and Sr-Nd-Pb isotope data, are used to investigate the petrogenesis and geodynamic evolution of SSMC. The 40Ar/39Ar radiometric age data constrains the magmatic events in the SSMC to between 34 and 21 Ma. Chondrite-normalized rare-earth element patterns are distinct for each volcanic succession; mafic and intermediate lavas have relatively flat light rare earth element (LREE) and large ion lithophile element (LILE) patterns, whereas the silicic volcanic rocks show enrichment in LREE and high field strength elements (HFSE). Within each volcanic phase, the total rare-earth element concentrations increase from mafic to silicic, and the size of the negative Eu anomalies progressively increase (Eu/Eu* from 0.02 to 1.04). The initial 87Sr/86Sr ratios are widely distributed (from 0.70344 to 0.71973) whereas the initial 143Nd/144Nd ratios are somewhat low and show a narrower range (0.51245 to 0.51287), indicating the mafic magmas derived from a slightly heterogeneous source. Geochemical modelling of the mafic volcanic rocks reveals two sources of magma: (1) a parental magmas generated from melting underlying lithospheric mantle; and (2) a second lithospheric melt contaminated by lower crust. Intermediate magmas evolved from assimilation and fractional crystallization (AFC) processes of both lithospheric melts, at shallower levels. The silicic volcanic rocks in the area, however, were probably …
crisid: 6575
type: Article
type: Information Content Entity
related by: authorship_42932
doi: 10.1016/j.lithos.2020.105613
origen: scopus
estado: published